Feed-gearing for machine-tools.



PATENTED NOV. 15, 1904.

Qw 4 .8 A1 7 7 0 N F. HOLZ. FEED GEARING FOR MACHINE TOOLS,

APPLICATION FILED AUG. 22. 1904.

2 SHBETS-SHEET 1 N0 MODEL.

h'manfoz Qttowwgb No. 774,843. PATENTED NOV. 15, 1904.

' P. HOLZ.

FEED GEARING FOR MACHINE TOOLS. APPLIOATION FILED AUG. 22. 1904. N0MODEL. 2 SHEETS-SHEET 2.

amoznfpz Witueowi %M &0. CQXQ M1416 on line 3/ y, Fig. 3.

UNITED STATES Patented November 15, 1904.

PATENT OEEIcE.

MILLING MACHINE COMPANY, O

TION.

F CINCINNATI, OHIO, A CORPORA FEED-GEARING FOR MACHINE-TOOLS-SPECIFIGATION forming part of Letters ,Iatent No. 774,843, datedNovember 15, 1904.

Application filed August 22, 1904.

To all whmn it may concern:

Be it known that I, FREDERICK How, a citizen of the United States,residing at Cincin nati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Feed-Gearing forMachine- Tools, of which the following is aspecification.

My invention relates to an improvement shown as applied togrinding-machines; and it consists principally in the feed-gearing andcontrol of the carriage supporting the work.

One of the objects of my invention is to provide tension means forquickly operating a clutch for changing the traverse of the carriageafter the clutch-operating mechanism has been tripped.

Another object of my invention relates to the variable-feed gearinginterposed between the main drive and carriage for varied feed to thecarriage. I 4

Various other features of my invention ar set forth in the descriptionof the accompanying drawings, forming a part of this specification, inwhich- Figure l is a front elevation of a grindingmachine embodying myimproved carriagefeed. Fig. 2 is an enlarged front elevation of thesaddle upon which the carriage is supported and traversed, so much ofthe saddle being shown withinwhich the carriage-feed is supported. Fig.3 is a front elevation of the power-controlling mechanism for thecarriage-feed, illustrating the means for quickly operating the clutchfor imparting a forward or reverse movement of the carriage. Fig. 1 isan enlarged section on line 00 m, Fig. 2. Fig. 5 is an enlarged section,partly in elevation,

1 represents the frame of a grinder upon which the various parts of themachine are mounted. v

2 represents a U-shaped journal-bracket for supporting thegrinding-wheel spindle.

3 represents a pulley fixed to the spindle 1.

5 represents grinding-wheels mounted upon the spindle.

The frameis suitably provided with gibbed ways, upon which is supportedthe knee-brackimparting a ets 6, which supports the saddle and carriage.

Serial No. 221,641. (No model.)

This knee is suitably provided with mechanism for raising andlowering-the same, but

which are not herein shown, forming no part of this invention.

7 represents a saddle gibbed to the knee 6 and provided with means forsuitably adjusting the saddle longitudinally upon the knee.

8 represents a carriage seated upon the saddle having the usual rail andgroove engage- 14 represents a clutch member slidable on shaft 12 andadapted to rotate therewith.

15 and 16 represent right and lefthand clutch members adapted to beengaged by the clutch member 14.. These clutch members 15 and 16 areprovided with bevel-gears 17 18 at their outer ends in mesh with abevel-gear 19, journaled in the casing 9, which gear 19 is driven byeither gears 17 or 18, whichever is clutched to the shaft 12, enablingaforward or reverse rotation to be imparted to the gear 18 or 19.

'In this class of grinding-machine it is desirable to. automaticallyshift the clutch 1A to reverse the direction of carriage traverse andwhich is accomplished as follows: The carriage 8 at its front face isprovided with a groove 20. Within this groove are ad justabl y securedthe tripping-dogs 21 22, the distance at which they are set apart fromeach other controlling the length of the carriage traverse. 23represents a lever provided with a pin 24: in line with and adapted tobe engaged by the dogs 21 22 for actuating the lever 23. 25 represents ashaft fixed to the lever 23 and passing through the gear-box 10 andprojecting into the casing 9 and suitably journaled within thesemembers. 26 represents a lever or rock-arm fixed to the shaft andadapted to be operated thereby, the free end of the lever 26 dependingdownward and provided with the V-shaped point 27. 28 represents ashifting rod supported within the casing 9 and provided with the nuts 2930, between whichnuts the lever or rock-arm 26 projects. 31 represents ayoke-arm secured to the shaft 28, the yoke of which is seated within thegroove 32 of the clutch member 14. Thus it will be seen that when eitherone of the dogs 21 22, according to the traverse of the carriage, tripsthe lever 23 it will rock shaft 25 and rock-arm 26, shifting the rod 28in such direction, which action will throw the clutch member 14 intoengagement with either one of the clutch members 15 16, thereby drivingthe gear-wheel 19 in proper direction.

In order to quickly and positively throw and control the clutch member14 after it has been tripped, the following tension means is provided:33 represents a tension-lever, one end of which is pivoted to the casing9. The opposite end is freely mounted within the guide 34 integral withthe casing. This prevents any lateral movement of the tensionlever 33.This tension-le ver 33 is provided with the bevel or tapering projection35, adapted to engage the corresponding projection of the rock-arm 26.37 represents a tension-rod engaging the tension-lever 33 at one end,its opposite end tapping through an orifice in the casing 9, formingaguide for said rod 37. 38 represents a coil-spring having bearing atone end against the casing and at the opposite end against theadjusting-nuts 39. The tensionlever having an upward tension at alltimes,

the angular projection will always be engaged with the rock-arm 26.Thus, say that the rock-arm 26 be rocked to the right, the incline onthe right of the free end of the rock-arm will ride upthe incline on theleft of the tension-lever until the terminal of each incline is reached,at which point the tensionlever will be relieved of the downward strainof the rock-arm,whence it will have a tendency to fly upward upon theopposite inclines,throw ing the shifting rod quickly to the right,thereby making a quick and positive engagement of the clutch member 14with the clutch member 15, this action being controlled by the tensionof the spring 38.

It is very desirable in this class of machine to impart for differentclasses of work a varied feed of carriage traverse. In order toaccomplish this, the gear-box 10 is provided with the following systemof change-gearing: 40 represents a shaft to which the bevel-gear 19 isfixed, said shaft extending through the elongated j ournal-sleeve 41 ofthe casing 9 and projects into the gearbox 10. Upon the end of saidshaft 40 is formed a gear 42.

43 represents a sleeve-shaft journaled in the gear-box 10 andsupplemental casing 44. Upon 45, said gear being provided with a sleeve46,

having clutch-teeth 47. VVithin the sleeveshaft 43 is slidably mounted ashifting rod 48, keyed to said sleeve-shaft 43, so as to turn therewith.49 represents a clutch member fixed to the end of rod 48, the teeth ofwhich are adapted to be engaged with the clutch member 47 of thegear-wheel 45. 50 represents a gear of a different diameter from that of45, fixed to the sleeve-shaft 43 in mesh with a gear-wheel 51, looselyjournaled upon the shaft 52, said gear 51 being provided with the clutchmember 53. 54 represents another different-diameter gear-wheel formed onthe sleeve-shaft 43 in mesh with a gear 55, loosely journaled on theshaft 52 and provided with the clutch member 56. 57 represents a pushrodfitted into a bore in the shaft 52 and provided with a pin orclutchmember 58, said rod 57 being adapted to be pushed forward orbackward, thereby throwing the pin 58 into engagement with theclutchmember 53 of the gear 51 or with the clutch member 56 of the gear-wheel55, as the case may be. 59 represents a collar fixed to the shaft 52 forsecurely holding gear in position on the shaft 52. 60 represents asleeve fixed in the casing 10, through which the shaft 52 projects andwithin which it is journaled. 61 represents a collar fixed to the shaft52, having bearing against the sleeve 60, the shaft being provided witha shoulder abutting the opposite end of the sleeve for securely holdingshaft 52 in position. 62 represents gear-teeth formed on the shaft 52and in mesh with the gear-wheel 63, fixed to the stud-shaft 64, whichstud-shaft is suitably mounted in bearings in the gear-box 10. 65represents a rack secured to the carriage 8, gear-wheel 63 being in meshwith said rack for traversing the same. 66 represents a hand-wheel fixedto the sleeve-shaft 43 for operating said shaft by hand. Thus to impartone speed for the forward or reverse traverse of the carriage thefollowing train of gears is in action: from pulley 11, drivingshaft 12,through the clutchl4, driving bevelwheel 17 or bevel-wheel 18, whicheveris engaged with the clutch, driving gear-wheel 19, shaft 40, gear 42,gear 45 on the sleeve-shaft 43, clutch member 49 being engaged withclutch member 47, thus driving sleeve-shaft 43, gear-wheel 50,gear-wheel 51, with clutch member 58 being in mesh with clutch member 53of gear 51, thereby driving shaft 52, thence through gear 63, driven bythe gear formed on the shaft 52, said gear 63 driving or traversing thetable. The second change of speed being made by bringing the clutchmember 58 into engagement with the clutch member 56 of gear-wheel 55,disconnecting gear-wheel 51, motion will be imparted to the gear 63through the gears 54 and 55, gears 50 and 51 being idle as drivers.

In order to traverse the carriage by hand,

thissleeve-shaft 43 is loosely mounted a gear i clutch member 49 isdisengaged from the clutch member 4:? by pushing the clutch-rod 48inward. Thus by revolving the hand-wheel 66 motion is transmitted,through sleeve-shaft &3, gears 50 51, to shaft 52, if the clutch member56 is engaged with the clutch member of gear 52, through said shaft 52,gears 62 63, to the carriage-rack 65. Changing the clutch member toengage into the clutch member of the gear 55, motion will be imparted tothe carriage from gear-wheel 54 through gear 55, shaft 52, gear 62, gear63 to the carriagerack 65. By this construction two changes of speed areadapted to be received and imparted to the carriage when either thepower or hand drive is employed, and which arrangement is very compactand easily and quickly manipulated.

By the term corresponding tapering projections is meant any formation onthe meeting surfaces of the tension-bar and rock-arm adapted to insure afull and quick movement of the rock-arm.

In order to understand the phraseology employed in the claims, it shouldbe explained that the term shifting device is intended to covergenerically the mechanism which as it is shifted to the right or left bythe actuating-arm 26 alternately reverses the speed, and in the formshown said mechanism specifically comprises the clutch 14, the slidingshaft 28. the connecting-arm 31, and the blocks 29 and 30, which formthe connection between the shifting device and the actuating rockarm 26.This specific arrangement is not of the essence of the invention and canbe substituted by other well-known forms of speedchanging devices.

Having described my invention, I claim 1. In a machine of the classdescribed, a frame, a reciprocating carriage thereon, a feed mechanismtherefor, comprising right and left hand and intermediate bevelgear-wheels, a shifting device adapted to alternately reverse thedirection of feed, a rock-shaft, connections between the rock-shaft andcarriage adapted to alternately rotate said shaft in oppositedirections, a rock-arm on said shaft, connections between the rock armand shifting device adapted to reciprocate the latter, a tension-leverfulcrumed on the frame, a tension device engaging the free end of thebar and pressing it yieldingly against the end of the rock-arm, saidrock-arm and tension-bar having corresponding tapering projections ontheir meeting surfaces, adapted to complete the throw of the rock-arm inopposite directions, as it is actuated by the tripping connectionsbetween the rock-shaft and carriage, substantially as described.

2. In a machine of the class described, a frame, a reciprocatingcarriage, a feed mechanism therefor comprising right and left hand andintermediate bevel gear-Wheels, a shifting device adapted to alternatelyreverse the direction of feed, a rock-shaft, tripping connectionsbetween the rock shaft and carriage adapted to alternately rotate saidshaft in opposite directions, a rock-arm depending from the rock-shaft,connections between the rockarm and the shifting device adapted toreciprocate the latter, a horizontally-disposed tension-bar fulcrumed onthe frame, a spring engaging the free end of the bar and pressing ityieldingly against the rock-arm, said rockarm and tension bar havingcorresponding tapering projections on their meeting surfaces adapted toimpart a predetermined throw to the rock-arm in opposite directions asit is actuated by the tripping connections between the rock-shaft andcarriage, substantially as described.

3. In a machine of the class described, a frame, a reciprocatingcarriage, a feed mechanism therefor comprising right and left hand andintermediate bevel gear-wheels, a shifting device adapted to alternatelyreverse the direction of feed, a rock-shaft, tripping connectionsbetween the rock shaft and carriage adapted to alternately rotate saidshaft in opposite directions, a rock-arm on the rock-shaft, connectionsbetween the rock-arm and shifting device adapted to reciprocate thelatter, a tensionbardisposed substantially at right angles to therock-arm, said bar being pivoted at one end; an adjustablespring-controlled plunger under the free end of the tension-bar adaptedto press said bar yieldingly upward directly against the end of therock-arm, said rock-arm and tension-bar having corresponding taperingprojections on their meeting surfaces adapted to impart a predeterminedthrow to the rock-arm in opposite directions as it is reciprocated bythe tripping connections between the rock-shaft and carriage,substantially as described.

4. In a machine of the class described, a frame, a reciprocatingcarriage, a feed mechanism for the carriage comprising reversinggear-Wheels on the rear of the frame, a shifting device for alternatelybringing into operation the reversing gear-wheels, a rock-shaft,

transversely journaled through the frame,

tripping connections between the front end of the rock-shaft and thecarriage adapted to alternately rotate said shaft in oppositedirections, a rock-arm on the rear end of the rockshaft, connectionsbetween the rock-arm and shifting device adapted to reciprocate thelatter, a tension-bar pivoted on the rear of the frame transverselyrelative to the rock-arm, an adjustable spring-controlled plungerengaging directly the free end of the tension-bar and pressing the sameyielding] y directly against the rock-arm, said rock-arm and tension-barhaving corresponding tapering projections on their meeting surfacesadapted to impart a predetermined throw to the rockarm in oppositedirections as it is reciprocated by the tripping connections between therockshaft and carriage, substantially as described.

IIO

5. In a machine of the class described, a frame, a reciprocatingcarriage thereon, a feed mechanism therefor, comprising a right and lefthand and intermediate bevel gear-wheels, clutch members on said rightand left hand gears, a shifting device comprising a shifting clutchmember adapted to alternately engage the cooperating clutch members onsaid gearwheel to alternately reverse the direction of feed,transmission-gearing between said bevel gear-wheel and carriage, saidtransmissiongearing being adapted to be thrown into and out ofcommission by said clutch mechanism for imparting a varied traverse feedto the carriage, a rock-shaft, connections between the rock-shaft andcarriage adapted to alternately rotate said shaft in oppositedirections, arock-arm on said shaft, connections between the rock-armand shifting device adapted to reciprocate the latter, a tension-leverfulcrumed on the frame, atension device engaging the free end of the barand pressing it yieldingly against the end of the rock-arm, saidrock-arm and tension-bar having corresponding tapering projections ontheir meeting surfaces, adapted to complete the throw of the arm inopposite directions as it is actuated by the tripping connectionsbetween the rockshaft and carriage, substantially as described.

6. In a machine of the class described, a frame, a reciprocatingcarriage thereon, a feed mechanism therefor, comprising right and lefthand and intermediate bevel gear-wheels, a shifting device adapted toalternately reverse the direction of feed, transmission-gearing betweensaid bevel gear-wheel and carriage, comprising a sleeve-shaft providedwith two gears of different-diameter fixed thereto, a third gear ofdifferent diameter loose upon said sleeve-shaft and provided with aclutch member, a rod slidably fixed within said sleeve-shaft having aclutch member adapted to be engaged with the clutch member of thelast-named gear, a second sh aft provided with three difierent -diametergearwheels, two of which are loosely mounted thereon and in mesh withthe fixed gears on the sleeve-shaft,a clutch push-pin fitted within saidlast-named shaft adapted to fix either one of said loose gears to saidshaft whereby two, changes of feedmay be imparted to the carriage, ahand-wheel fixed to the sleeve-shaft adapted to feed the carriage byhand, a rockarm actuated by the carriage for shifting the shiftingdevice, a tension-lever fulcrumed on the frame held yieldingly againstthe end of the rock-arm, said rock-arm and tension-bar havingcorresponding tapering projections on their meeting surfaces, adapted tocomplete the throw in a shifting operation, substantially as described.

In testimony whereof I have hereunto set my hand.

FREDERICK HOLZ.

Witnesses: OLIVER B. KAIsER, LEO ODONNELL.

